Spokane, WA – September closed out with hotter-than-normal temperatures and below-average rainfall across much of the Inland Northwest, according to the National Weather Service.
Spokane, Lewiston, and Wenatchee all reported higher-than-usual average temperatures for the month. Spokane averaged 68.8°F, more than seven degrees above normal. Lewiston led the region with an average of 71.4°F, while Wenatchee logged 71.0°F.
According to the National Weather Service, extreme heat hit early in the month. Spokane reached 99°F on September 1–2, Wenatchee hit 99°F on September 2–3, and Lewiston climbed to 102°F on both September 1 and 2.
Rainfall was uneven across the region. Spokane measured 0.43 inches, below its normal 0.58 inches. Wenatchee saw just 0.06 inches, well under its usual 0.23 inches. Lewiston, however, bucked the trend, collecting 1.24 inches of rain—more than double its September average.
Cold nights arrived late in the month. Spokane dropped to 42°F on September 26, Lewiston cooled to 48°F on September 23 and 27, and Wenatchee saw its low of 49°F on September 28.
No measurable snow was recorded at any of the three sites.
The warmer and generally drier pattern highlights shifting fall weather in the Inland Northwest as October begins.
